The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2001
Filed:
Jul. 08, 1999
Wang Nang Wang, Lympley Stoke, GB;
Neil Anthony Fox, Cheltenham, GB;
Smiths Group PLC, London, GB;
Abstract
A diamond grit surface is formed on a substrate (,) having a metal surface (,), such as nickel, by applying a paste (,) of low-grade diamond grit in a binder to the surface. After driving off the binder, the diamond coated surface is placed in a reactor chamber (,) having a microwave plasma reactor (,) and connected to a hydrogen gas pump (,). The substrate (,) is heated in the hydrogen atmosphere at a reduced pressure. The metal surface (,) acts as a catalyst in the presence of the hydrogen plasma to cause regrowth of the diamond (,), giving an improved size, shape and adhesion. The method may be used to make diamond surfaces in electron emitter devices, circuit boards or abrasive devices.